R1225N122K-TR-FE

Overview

The R1225N122K-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices. It supports an input voltage range up to 18.5V and utilizes PWM/VFM control modes for efficient power conversion. The device is housed in a SOT-23-Wide-6 package and belongs to the R1225N series. Designed as a switching controller, it integrates essential functions for buck converter applications within a compact form factor suitable for space-constrained electronic designs.

Feature Summary

• Supports both Pulse Width Modulation (PWM) and Frequency Modulation (VFM) control modes for optimized efficiency across varying load conditions.
• Accepts input voltages up to 18.5V, providing flexibility for various power supply architectures.
• Delivers stable step-down DC/DC conversion capabilities through integrated switching controller logic.

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems utilizing buck conversion topologies
• General-purpose embedded electronics with limited board space

Procurement Notes

Verify the specific suffix K against the official datasheet to confirm output voltage or timing characteristics if applicable. Ensure the SOT-23-Wide-6 package matches your PCB footprint requirements. Confirm RoHS compliance status directly from the manufacturer's documentation before finalizing component selection for production.

Selection Notes

Select this controller when an 18.5V input tolerance is required alongside flexible PWM/VFM operation. The SOT-23-Wide-6 package offers a balance of thermal performance and size. Consider external component values for inductors and capacitors based on the target switching frequency and output current specifications defined in the technical data.

Part Context

This component is part of the R1225N series, which focuses on switching controllers for power management applications. The series provides solutions for step-down voltage regulation in modern electronic systems. Nisshinbo Micro Devices positions these ICs within their PMIC portfolio for reliable performance in consumer and industrial sectors.

Replacement Considerations

Check the R1225N102K-TR-FE and R1225N502K-TR-FE for alternative fixed output options within the same series. Verify pin compatibility and electrical parameters against the original design requirements before substituting any other buck controller models.